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by peterlite
Sat Apr 22, 2017 1:19 am
Forum: Beginners
Topic: Very very slow wifi on RPI 3
Replies: 1
Views: 1054

Re: Very very slow wifi on RPI 3

There are many posts on slow Wifi. The forum search is almost useless that detailed searches. Use google. Search for raspberry pi slow wifi. You will see lots of note about settings. The built in Wifi is 100Mbit through the USB2 hub. A USB 2 Gigabit adapter will be slightly faster but only after you...
by peterlite
Sat Apr 22, 2017 1:14 am
Forum: Beginners
Topic: Resize the file system on USB drive?
Replies: 2
Views: 1091

Re: Resize the file system on USB drive?

As mentioned, Gparted is the best approach. Boot from a Raspbian microSD card. Install Gparted if not already installed. Plug in the USB disk and resize. Keep the microSD Raspbian card for future changes. A 4 GB card is all you need. You can remove a GB or two by deleting the applications you do not...
by peterlite
Fri Apr 21, 2017 6:38 am
Forum: General discussion
Topic: Micro SD capacity
Replies: 15
Views: 1785

Re: Micro SD capacity

You can plug in a UHS 3 card/adapter and it works at UHS 1 speed. The higher speed needs extra connectors. What you will get is faster write speeds up to the limit of the card or the Pi USB2 interface, whichever is lowest.
by peterlite
Thu Apr 20, 2017 8:58 pm
Forum: General discussion
Topic: Old PC with Debian with pixel x86
Replies: 13
Views: 2220

Re: Old PC with Raspbian

Linux Mint is the closest to Raspbian as it is a user friendly distribution based on Debian Jessie. You get the choice of user interfaces, Cinnamon, MATE, and Xfce. Xfce is a lighter weight GUI similar to the LXDE used in Raspbian.
by peterlite
Thu Apr 20, 2017 8:55 pm
Forum: Other projects
Topic: RV Integration
Replies: 31
Views: 7557

Re: RV Integration

4 TB disk. FAT is limited to 2 TB. ExFAT is proprietary and not in Linux. Ext4 is not in Windows. NTFS handles 4 TB and is supported in Windows, Linux, almost every OS. For 4 TB, NTFS has an overhead of a couple of hundred MB, similar to other file systems. NTFS is more efficient at storing small fi...
by peterlite
Thu Apr 20, 2017 11:31 am
Forum: General discussion
Topic: 5 terabytes for the Pi?
Replies: 4
Views: 1361

Re: 5 terabytes for the Pi?

A 3.5" 8 TB drive is 30% cheaper per TB. 8-)
by peterlite
Thu Apr 20, 2017 11:28 am
Forum: General discussion
Topic: 5 terabytes for the Pi?
Replies: 4
Views: 1361

Re: 5 terabytes for the Pi?

The speeds are consistent with what I measured. I transferred files which means half the USB 2 bandwidth was used writing to the microSD card (a very fast SD card). The Gigabit Ethernet speed increase was significant even with a very cheap adapter. Given the measurements from other people, an extern...
by peterlite
Thu Apr 20, 2017 11:04 am
Forum: Other projects
Topic: Possibility of multiple security camera setup using Pi stuff
Replies: 5
Views: 7787

Re: Possibility of multiple security camera setup using Pi s

USB has a limit of about 5 metres when using moderately priced cables and devices. Ethernet can run 50 ~ 100 metres with an equivalent priced cable. The Wifi on a Pi Zero W and a Pi 3B is somewhere in the middle if there are no walls to block the signal. Glass windows do not count. Bluetooth is limi...
by peterlite
Thu Apr 20, 2017 6:41 am
Forum: General discussion
Topic: 5 terabytes for the Pi?
Replies: 4
Views: 1361

5 terabytes for the Pi?

Seagate now have a 5 terabyte disk in a 2.5" size. You can run it straight from a Pi 3B. Would be interesting to fill a 5 TB drive with small files then perform a search for a file. This would give us an idea about how practical a 5 TB Pi NAS would be for general purpose use. The 5 TB drive is lower...
by peterlite
Thu Apr 20, 2017 6:12 am
Forum: Other projects
Topic: RV Integration
Replies: 31
Views: 7557

Re: RV Integration

For several cameras using the Raspberry Pi camera, consider a Pi Zero W at each camera location with one camera on each Pi Zero. Each Zero can Wifi back to your central Pi 3. Each Pi Zero can selectively transmit. If there is no motion, do not transmit. You store less data that way.
by peterlite
Thu Apr 20, 2017 6:08 am
Forum: Other projects
Topic: RV Integration
Replies: 31
Views: 7557

Re: RV Integration

I use an Android hotspot with several connections. Does the iPhone have a limit on the connections? A USB 3 external disk would be a faster way of backing up your non Pi computers. I use rsync to backup my little notebook. The first backup, the whole terabyte, is too slow for the USB 2 on the Pi. Af...
by peterlite
Thu Apr 20, 2017 6:01 am
Forum: Beginners
Topic: Performance of pi zero and max hd size?
Replies: 8
Views: 1920

Re: Performance of pi zero and max hd size?

Prototyping is usually easiest on a Pi 3 with all the fancy editors and plenty of USB sockets for keyboards etc. The microSD card can then slip into a Pi Zero. Editing config files on a Pi Zero is the same if you use a lightweight editor like the supplied Leafpad. You only notice the speed differenc...
by peterlite
Thu Apr 20, 2017 12:52 am
Forum: Beginners
Topic: Performance of pi zero and max hd size?
Replies: 8
Views: 1920

Re: Performance of pi zero and max hd size?

USB boot is discussed at viewtopic.php?f=63&t=155167
by peterlite
Thu Apr 20, 2017 12:46 am
Forum: Advanced users
Topic: Massively slow file writes
Replies: 18
Views: 4862

Re: Massively slow file writes

Last year I tested a Sandisk Ultra microSDHC UHS-I class 10 card 8 GB. The card started with a brief 30 MB/second write then slowed to 3 MB/s with an up/down pattern suggesting an erase cycle catchup every few seconds. A Sandisk Extreme card had ten times the write speed of the Sandisk Ultra card. A...
by peterlite
Thu Apr 20, 2017 12:17 am
Forum: Beginners
Topic: Performance of pi zero and max hd size?
Replies: 8
Views: 1920

Re: Performance of pi zero and max hd size?

Downloading several GB/day? You would run up against Pi USB 2 speed. Could do it if evenly spaced across the day. 100Mbit is about 10Mbyte and USB 2 handles 30~35 MB. Booting from 4GB a problem. Start boot from microSD card then switch to 4 GB drive or just use the drive for data. There are many pos...
by peterlite
Thu Apr 20, 2017 12:06 am
Forum: Raspbian
Topic: Orca and VMG not working
Replies: 7
Views: 1466

Re: Orca and VMG not working

Today I noticed there is an accessibility forum. There probably should be a link from there to here. I will put a topic in there linking here for your instructions on VMG.
by peterlite
Thu Apr 20, 2017 12:04 am
Forum: Raspbian
Topic: Orca and VMG not working
Replies: 7
Views: 1466

Re: Orca and VMG not working

Thank you ktb. VMG is the bit of most interest to me. I will try your debugged instructions. I would not be able to debug the install scripts. Too :geek: for me.
by peterlite
Wed Apr 19, 2017 11:54 pm
Forum: General discussion
Topic: Rasberry Pi as a dongle
Replies: 6
Views: 1309

Re: Rasberry Pi as a dongle

I needed 4G and tried to use a Pi 3. I ended up buying a TP-Link router that was slightly cheaper than a Pi 3B. The router has USB input for any 4G dongle, greater Wifi range, and Gigabit Ethernet for my other computers. All the software is preconfigured. It is one area where a Pi 3 is not cost effe...
by peterlite
Wed Apr 19, 2017 3:17 am
Forum: Raspbian
Topic: Orca and VMG not working
Replies: 7
Views: 1466

Re: Orca and VMG not working

I will delete them and go back to a clean Raspbian. Ubuntu MATE was a disaster when I tested it last year. When someone wants screen reading, I will recommend Linux Mint on a low cost notebook. I can then plug in a Pi as a VNC source or a USB slave.
by peterlite
Tue Apr 18, 2017 9:53 pm
Forum: Advanced users
Topic: Massively slow file writes
Replies: 18
Views: 4862

Re: Massively slow file writes

Your flash memory device writes fast until all erased blocks are used up then stops to erase more blocks ready for future writes. A faster card/device will perform the erases in the background and be ready to write when you send data to write. Small writes are bad. For every write, the card may inte...
by peterlite
Tue Apr 18, 2017 9:44 pm
Forum: Other projects
Topic: Looking for a system, is it possible?
Replies: 6
Views: 1708

Re: Looking for a system, is it possible?

OpenHAB is open source home automation. https://www.openhab.org/
viewtopic.php?f=37&t=133016
by peterlite
Tue Apr 18, 2017 9:30 pm
Forum: General discussion
Topic: Re-formatting the SD card
Replies: 25
Views: 87830

Re: Re-formatting the SD card

You can use a live version of a Linux distribution. Linux Mint is my choice. You boot Linux from a USB stick and use Linux tools such as Gparted. I have a small USB stick, 8 GB, with Gparted set up ready to fix disk problems for the other operating systems you mentioned.
by peterlite
Tue Apr 18, 2017 9:23 pm
Forum: Networking and servers
Topic: How to share internet connection between phone and RPi
Replies: 5
Views: 1447

Re: How to share internet connection between phone and RPi

On Android, you go through an approval process on the phone. When you see the computer in the phone's hotspot list, you add the computer to the approved list. There must be a how to page somewhere showing that for iOS.

You could change the thread title to include iOS.
by peterlite
Tue Apr 18, 2017 10:26 am
Forum: Networking and servers
Topic: How to share internet connection between phone and RPi
Replies: 5
Views: 1447

Re: How to share internet connection between phone and RPi

Upgrade the phone to Android. :D

Does the phone show that it can see the Pi? Are there errors on syslog? What part is working and where does it fail?

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